Expansion bolt capable of being turned over and locked and using method thereof

Abstract

The invention relates to the field of engineering construction, in particular to an expansion bolt capable of being turned over and locked and a using method thereof. Comprising a screw rod, and a first end part of the screw rod is inserted into a mounting hole of a wall body; the sleeve sleeves the screw and is inserted into the mounting hole, and the outer diameter of the sleeve is smaller than the inner diameter of the mounting hole; the first nut is mounted at the second end part of the screw rod, the position of the first nut is adjustable, and the first nut is propped against the lower end of the sleeve; the at least two locking blocks are evenly distributed on the circumference of the screw rod, the upper ends of the locking blocks are hinged to the first end of the screw rod, the inner side faces of the locking blocks abut against the upper end of the sleeve, the sleeve is pushed to move upwards by screwing the first nut, then the locking blocks are pushed to rotate, the lower ends of the locking blocks are anchored into the inner wall of a mounting hole, and the locking blocks are fixed to the inner wall of the mounting hole. And the effect of locking the screw rod is achieved. The screw locking device has the beneficial effects that the locking block is arranged at the end, extending into the mounting hole, of the screw, and the sleeve arranged on the screw in a sleeving mode pushes the locking block to rotate, so that the locking block can be anchored into the hole wall of the mounting hole, and the purpose of locking the screw is achieved.

Description

Technical Field

[0001] The invention relates to the field of engineering construction, and in particular to a rotatable and lockable expansion bolt and a use method thereof. Background Art

[0002] According to relevant engineering surveys, the expansion bolts currently used in construction projects include screws, nuts and expansion sleeves, wherein the end of the screw is a frustum head, and one end of the expansion sleeve is slit for expansion and deformation; when in use, the nut is tightened, and the frustum head is pressed into the expansion sleeve, forcing it to expand and deform, and support it in the installation hole to achieve the purpose of tightening.

[0003] However, the commonly used expansion bolts have the following defects:

[0004] (1) It utilizes the metal deformation of the expansion sleeve, so it is difficult to disassemble when not in use, and it is easy to damage the wall during disassembly. Moreover, it cannot be reused after being forcibly taken out, which wastes resources.

[0005] (2) The opening of the expansion sleeve faces the inside of the installation hole and cannot form a "barb", which may cause a risk of slipping out of the installation hole.

[0006] (3) In order to meet the deformation requirements during use, the expansion casing should not be too thick. After being eroded or subjected to load for many years, its durability will decrease, which may easily lead to safety accidents.

[0007] With the development of urban construction, turnover is an important theme in the field of construction. Therefore, a more convenient, reliable and turnaround expansion bolt is needed, which can solve the problems of traditional expansion bolts being easy to fall out of the holes over time, difficult to disassemble and wasting resources, and improve the reliability, removal efficiency and reuse rate of fasteners in construction. Summary of the invention

[0008] The purpose of the present invention is to overcome the defects of the prior art and provide a rotatable and lockable expansion bolt and a method of using the same, so as to solve the problems that the existing expansion bolts have the risk of falling off after installation, are easy to damage the wall when removed and cannot be rotatable.

[0009] The technical solution to achieve the above purpose is:

[0010] The present invention provides a rotatable and lockable expansion bolt, comprising:

[0011] A screw rod, wherein a first end of the screw rod is inserted into a mounting hole of the wall;

[0012] A sleeve sleeved on the screw rod and inserted into the mounting hole, wherein the outer diameter of the sleeve is smaller than the inner diameter of the mounting hole;

[0013] A first nut installed at the second end of the screw, the position of the first nut being adjustable and abutted against the lower end of the sleeve; and

[0014] At least two locking blocks, evenly distributed on the circumference of the screw and hinged to the first end of the screw at the upper end, the inner side of the locking block being abutted against the upper end of the sleeve. By screwing the first nut to push the sleeve upward, the locking block is further pushed to rotate, so that the lower end of the locking block is anchored into the inner wall of the installation hole, achieving the effect of locking the screw.

[0015] Further, the lower end of the locking block is formed into a sharp end, and the sharp end abuts against the inner wall of the installation hole;

[0016] The side wall of the locking block is provided with patterns.

[0017] Further, it further includes: a frustum head formed at the first end of the screw, the diameter of the frustum head being equal to the outer diameter of the sleeve;

[0018] A hinge seat provided at the bottom of the frustum head, and the locking block is hinged to the hinge seat.

[0019] Further, the first end of the screw is a smooth section, and the second end is a threaded section. The smooth section is inserted into the sleeve and the threaded section is partially located inside the sleeve.

[0020] Further, the rotation angle of the locking block in the locked state is between 30° and 60°.

[0021] Further, it further includes a first gasket provided between the first nut and the sleeve.

[0022] Further, it further includes a second nut provided at the first end of the screw, abutted against the corresponding side of the first nut, and the item to be fixed is installed between the first nut and the second nut;

[0023] A second gasket, provided inside the second nut.

[0024] Further, there are four locking blocks.

[0025] The present invention also provides a method for using a reusable and lockable expansion bolt, which specifically includes the following steps:

[0026] Provide the expansion bolt as described in claim 1;

[0027] Insert the first end of the screw into the installation hole;

[0028] Rotate the first nut. After the first nut abuts against the wall, the screw rod will move towards the installation hole, causing the locking block to rotate under the guidance of the sleeve until the locking block is anchored into the inner wall of the installation hole, and then stop rotating the first nut;

[0029] When it is to be disassembled, unscrew the first nut and the sleeve, push the screw rod into the installation hole, so that the locking block is reset, and then pull the screw rod outwards.

[0030] Further, after the expansion bolt is locked, provide a second nut and screw the second nut onto the second end of the screw rod and abut it against the first nut.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] By providing a locking block at one end of the screw rod extending into the installation hole and pushing the locking block to rotate through a sleeve sleeved on the screw rod, the locking block can be anchored into the hole wall of the installation hole, so as to achieve the purpose of locking the screw rod. When disassembling, push the screw rod inwards to reset the locking block, and then pull the screw rod outwards. The screw rod can be taken out without damaging the installation hole, and the taken-out screw rod can be used in the next installation hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of the reusable and lockable expansion bolt of the present invention.

[0034] Figure 2 It is an installation schematic diagram of the reusable and lockable expansion bolt of the present invention.

[0035] Figure 3 It is a schematic diagram of the screw rod of the reusable and lockable expansion bolt of the present invention.

[0036] Figures 4 to 5 It is a locking schematic diagram of the reusable and lockable expansion bolt of the present invention.

[0037] Legend: 10, screw rod; 101, smooth section; 102, threaded section; 103, round table head; 104, hinge seat; 20, sleeve; 30, locking block; 401, first nut; 402, second nut; 501, first gasket; 502, second gasket; 601, wall; 602, installation hole. DETAILED DESCRIPTION OF THE INVENTION

[0038] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0039] Refer to Figure 1, the present invention provides a reusable and lockable expansion bolt and its usage method, which solves the problems that the existing expansion bolts have the risk of falling off after installation, are prone to damage the wall during demolition, and cannot be reused. By providing a locking block at one end of the screw rod inserted into the installation hole, and driving the locking block to rotate through a sleeve sleeved on the screw rod, so that the locking block can be anchored into the hole wall of the installation hole, thereby achieving the purpose of locking the screw rod. During disassembly, push the screw rod inward to reset the locking block, and then pull out the screw rod outward to remove the screw rod without damaging the installation hole, and the removed screw rod can be used in the next installation hole.

[0040] The following will describe a reusable and lockable expansion bolt and its usage method according to the present invention with reference to the accompanying drawings.

[0041] Refer to Figure 1 , which shows a schematic structural diagram of the reusable and lockable expansion bolt of the present invention. Refer to Figure 2 , which shows an installation schematic diagram of the reusable and lockable expansion bolt of the present invention. The following will describe a reusable and lockable expansion bolt and its usage method according to the present invention with reference to Figure 1 and Figure 2 .

[0042] As shown in Figure 1 and Figure 2 , a reusable and lockable expansion bolt of the present invention includes:

[0043] A screw rod 10, the first end of the screw rod 10 is inserted into an installation hole 602 of a wall 601;

[0044] A sleeve 20 sleeved on the screw rod 10 and inserted into the installation hole 602, the outer diameter of the sleeve 20 is smaller than the inner diameter of the installation hole 602;

[0045] A first nut 401 installed at the second end of the screw rod 10, the position of the first nut 401 is adjustable and abuts against the lower end of the sleeve 20; and

[0046] At least two locking blocks 30 are evenly distributed on the circumference of the screw rod 10 and the upper ends are hinged to the first end of the screw rod 10, the inner side surface of the locking block 30 abuts against the upper end of the sleeve 20, by screwing the first nut 401 to push the sleeve 20 to move upward, and further push the locking block 30 to rotate, so that the lower end of the locking block 30 is anchored into the inner wall of the installation hole 602, achieving the effect of locking the screw rod 10.

[0047] Preferably, the length of the sleeve 20 is 60 - 80 mm, the inner diameter is larger than the diameter of the screw 10, and the wall thickness is 1.2 mm. The end of the sleeve 20 is provided with an inwardly converging arc chamfer to facilitate jacking up the locking block 30. The depth of the installation hole 602 is 90 mm, and the inner diameter is 1 - 3 mm larger than the outer diameter of the sleeve 20.

[0048] In a specific embodiment, the lower end of the locking block 30 is formed into a sharp end, and the sharp end abuts against the inner wall of the installation hole 602; the side wall of the locking block 30 is provided with patterns. By setting the lower end of the locking block 30 as a sharp end, the locking block 30 is more easily anchored into the inner wall of the installation hole 602, and by providing the patterns, the friction force on the side of the locking block 30 is increased, thereby increasing the friction force with the inner wall of the installation hole 602 and enhancing the anchoring effect of the expansion bolt.

[0049] In a specific embodiment, it further includes: a frustum head 103 formed at the first end of the screw 10, the diameter of the frustum head 103 being equal to the outer diameter of the sleeve 20; a hinge seat 104 provided at the bottom of the frustum head 103, and the locking block 30 is hinged to the hinge seat 104. The number of hinge seats 104 is the same as the number of locking blocks 30, and each hinge seat 104 is hinged with a locking block 30.

[0050] Specifically, the cross-section of the locking block 30 is wedge-shaped, with a cross-section length of 4 mm and a width of 2 mm, and it is hinged to the hinge seat 22 through a pin shaft. The locking block 30 rotates relative to the hinge seat 22 through the pin shaft, and as a whole, it "opens" and "retracts" like an umbrella. Thus, by flexibly controlling the opening angle of the locking block 30, the locking installation and non-destructive removal of the expansion bolt are achieved, avoiding damage to the wall and enabling repeated use.

[0051] In a specific embodiment, the first end of the screw 10 is a smooth section 101, and the second end is a threaded section 102. The smooth section 101 is inserted into the sleeve 20 and a part of the threaded section 102 is located inside the sleeve 20. The diameter of the threaded section 102 is smaller than the diameter of the smooth section 101, and the diameter difference is 4 mm.

[0052] In a specific embodiment, the rotation angle of the locking block 30 in the locked state is between 30° and 60°. The optimal locking angle of the locking block 30 is between 30° and 60°, enabling the end of the locking block 30 to better anchor into the hole wall of the installation hole 602. When pulling the screw 10 outwards, the anchoring depth of the locking block 30 will become deeper and deeper, thereby increasing the stability of the screw 10.

[0053] In a specific embodiment, it further includes a first gasket 501 provided between the first nut 401 and the sleeve 20.

[0054] In a specific embodiment, it further includes a second nut 402 provided at the first end of the screw rod 10, which abuts against the corresponding side of the first nut 401, and the item to be fixed is installed between the first nut 401 and the second nut 402; a second gasket 502 is provided inside the second nut 402. On the one hand, the item to be fixed is clamped by the first nut 401 and the second nut 401, so as to achieve the effect of fixing the item at the designated position on the wall 601. On the other hand, by providing the second nut 402, after the first nut 401 is tightened, the second nut 402 is further tightened, so as to prevent the first nut 401 from loosening due to long-term use, thereby affecting the locking effect of the locking block 30 and ultimately causing the screw rod 10 to fall off.

[0055] In a specific embodiment, there are four locking blocks 30. By setting the number of locking blocks 30 to four, the locking blocks 30 lock the screw rod 10 in four directions, preventing the screw rod 10 from shaking, thereby avoiding loosening of the screw rod 10 caused by long-term shaking.

[0056] The present invention also provides a method for using a reusable and lockable expansion bolt, which specifically includes the following steps:

[0057] Provide the expansion bolt as described in claim 1;

[0058] Insert the first end of the screw rod 10 into the installation hole 602;

[0059] Rotate the first nut 401. After the first nut 401 abuts against the wall 601, the screw rod 10 will move towards the installation hole 602, causing the locking block 30 to rotate under the guidance of the sleeve 20 until the locking block 30 is anchored into the inner wall of the installation hole 602, and then stop rotating the first nut 401;

[0060] When disassembling, unscrew the first nut 401 and the sleeve 20, push the screw rod 10 into the installation hole 602 to reset the locking block 30, and then pull the screw rod 10 outwards.

[0061] In a specific embodiment, after the expansion bolt is locked, provide a second nut 402, and screw the second nut 402 onto the second end of the screw rod 10 and abut it against the first nut 401.

[0062] The following is a detailed description of the usage process of a reusable and lockable expansion bolt according to the present invention.

[0063] Insert the smooth section 101 of the bolt 10 into the mounting hole 602, and then screw the first nut 401. The first nut 401 abuts against the wall 601, and the screw rod 10 moves outward of the mounting hole 602 as a whole. At the same time, since the locking block 30 abuts against the sleeve 20, and the sleeve 20 abuts against the first nut 401, the screw rod 10 moves outward and drives the locking block 30 to move outward. Under the abutment of the sleeve 20, the locking block 30 rotates and finally anchors into the hole wall of the mounting hole 602. At this time, the first nut 401 can no longer be screwed.

[0064] The object to be fixed is mounted on the threaded section 102 of the screw rod 10, and then the second gasket 502 and the second nut 402 are installed. The second nut 402 is screwed and abutted against one side of the first nut 401 through the second gasket 502, so that the first nut 401 and the second nut 402 clamp and fix the object, and the second nut 401 tightens the first nut 402 at the same time.

[0065] When the expansion bolt needs to be removed, the second nut 402 and the first nut 401 are screwed off, and the screw rod 10 is pushed inward by hand or lightly tapped with a tool. The screw rod 10 moves into the mounting hole 602, thereby resetting the locking block 30, and then the screw rod 10 is pulled outward to be separated from the mounting hole 602. The expansion bolt can be taken out as a whole without damaging the wall 601, and can be used next time.

[0066] Then install the expansion bolt to the next place where it is needed.

[0067] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A reusable and lockable expansion bolt, characterized in that: Comprising: A screw rod (10), the first end of the screw rod (10) being inserted into the mounting hole (602) of the wall body (601); A sleeve (20) sleeved on the screw rod (10) and inserted into the mounting hole (602), the outer diameter of the sleeve (20) being smaller than the inner diameter of the mounting hole (602); A first nut (401) mounted on the second end of the screw rod (10), the position of the first nut (401) being adjustable and abutted against the lower end of the sleeve (20); and At least two locking blocks (30), evenly distributed on the circumference of the screw rod (10) and the upper ends being hinged to the first end of the screw rod (10), the inner side surfaces of the locking blocks (30) being abutted against the upper end of the sleeve (20), by screwing the first nut (401) to push the sleeve (20) to move upward, thereby pushing the locking blocks (30) to rotate, so that the lower ends of the locking blocks (30) are anchored into the inner wall of the mounting hole (602), achieving the effect of locking the screw rod (10).

2. The rotatable and lockable expansion bolt according to claim 1, characterized in that: The lower end of the locking block (30) is formed into a sharp end, and the sharp end abuts against the inner wall of the mounting hole (602); The side wall of the locking block (30) is provided with patterns.

3. The rotatable and lockable expansion bolt according to claim 1, characterized in that: Further comprising: A frustum head (103) formed at the first end of the screw rod (10), the diameter of the frustum head (103) being equal to the outer diameter of the sleeve (20); A hinge seat (104) provided at the bottom of the frustum head (103), and the locking block (30) being hinged to the hinge seat (104).

4. The expandable bolt capable of turnover and locking according to claim 1, wherein: The first end of the screw rod (10) is a smooth section (101), the second end is a threaded section (102), the smooth section (101) is inserted into the sleeve (20) and the threaded section (102) is partially located inside the sleeve (20).

5. The expandable bolt capable of turnover and locking according to claim 1, wherein: The rotation angle of the locking block (30) in the locked state is between 30° and 60°.

6. The expandable bolt capable of being turnover and locked according to claim 1, wherein: Further comprising a first gasket (501) provided between the first nut (401) and the sleeve (20).

7. A reusable and lockable expansion bolt according to claim 1, characterized in that: Further comprising a second nut (402) provided at the first end of the screw rod (10), abutted against the corresponding side of the first nut (401), and the article to be fixed is installed between the first nut (401) and the second nut (402); A second gasket (502), provided inside the second nut (402).

8. The rotatable and lockable expansion bolt according to claim 1, characterized in that: There are four of the locking blocks (30).

9. A method for using a reusable and lockable expansion bolt, characterized in that: Specifically comprising the following steps: Providing an expansion bolt as claimed in claim 1; Inserting the first end of the screw rod (10) into the mounting hole (602); Rotating the first nut (401), after the first nut (401) abuts against the wall body (601), the screw rod (10) will move towards the mounting hole (602), so that the locking block (30) rotates under the guidance of the sleeve (20) until the locking block (30) is anchored into the inner wall of the mounting hole (602), and stop rotating the first nut (401); When it is to be disassembled, unscrew the first nut (401) and the sleeve (20), push the screw rod (10) to move into the installation hole (602), so that the locking block (30) is reset, and then pull the screw rod (10) outwards.

10. The method of using a reusable and lockable expansion bolt according to claim 9, characterized in that: After the expansion bolt is locked, provide a second nut (402), screw the second nut (402) onto the second end of the screw rod (10) and abut it against the first nut (401).

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